Citation:

PANGAEA.919497

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Abstract:

Stable carbon (δ13C) and oxygen isotope (δ18O) and Mg/Ca-measurements were performed on the planktonic subsurface-dwelling foraminiferal species Globorotalia truncatulinoides. The foraminiferal specimens were selected from piston core M78/1-235-1, which was recovered from Tobago Basin (11°36.53'N 60°57.86'W) from 852 m water depth during R/V Meteor Cruise 78/1. Sampling and analytical studies were carried out from 630 to 800 cm core depth at 1-2 cm spatial resolution. This dataset extends the existing subsurface proxy records (Reißig et al., 2019; doi:10.1594/PANGAEA.897083) further back in time, now focusing on the time period of the latest fully developed D/O events (~30-37 ka BP). The isotope analyses were performed in 2019 on a Thermo Scientific MAT 253 mass spectrometer with an automated Kiel IV Carbonate Preparation Device. Trace metal analyses were performed on a VARIAN 720-ES Axial ICP-OES, a simultaneous, axial-viewing Inductively Coupled Plasma - Optical Emission Spectrometer coupled to a VARIAN SPS3 sample preparation system. The proxy data provide information on the Tobago Basin subsurface hydrography in relation to Western Boundary Current and North Atlantic Subtropical Gyre interdynamics.

Supplement to:

Nürnberg, Dirk; Riff, Tabitha; Bahr, André; Karas, Cyrus; Meier, Karl J F; Lippold, Jörg (2021): Western boundary current in relation to Atlantic Subtropical Gyre dynamics during abrupt glacial climate fluctuations. Global and Planetary Change, 201, 103497, https://doi.org/10.1016/j.gloplacha.2021.103497

Coverage:

Latitude: 11.608833 * Longitude: -60.964333

Date/Time Start: 2009-03-22T14:54:00 * Date/Time End: 2009-03-22T14:54:00

Minimum DEPTH, sediment/rock: 0.395 m * Maximum DEPTH, sediment/rock: 8.000 m

Event(s):

M78/1_235-1 (235-1) * Latitude: 11.608833 * Longitude: -60.964333 * Date/Time: 2009-03-22T14:54:00 * Elevation: -852.2 m * Location: N. Tobago * Campaign: * Basis: * Method/Device: Piston corer (PC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Nürnberg, Dirk		Geocode
2	AGE	Age	ka BP	Nürnberg, Dirk		Geocode
3	Sedimentation rate	SR	cm/ka	Nürnberg, Dirk
4	Globorotalia truncatulinoides, δ13C	G. truncatulinoides δ13C	‰ PDB	Nürnberg, Dirk	Mass spectrometer, Finnigan, MAT 253; coupled with Carbonate preparation device, Finnigan, KIEL IV	vs. VPDB
5	Globorotalia truncatulinoides, δ18O	G. truncatulinoides δ18O	‰ PDB	Nürnberg, Dirk	Mass spectrometer, Finnigan, MAT 253; coupled with Carbonate preparation device, Finnigan, KIEL IV	vs. VPDB
6	Globorotalia truncatulinoides, Magnesium/Calcium ratio	G. truncatulinoides Mg/Ca	mmol/mol	Nürnberg, Dirk
7	Globorotalia truncatulinoides, Magnesium/Calcium ratio	G. truncatulinoides Mg/Ca	mmol/mol	Nürnberg, Dirk		outlier
8	Sub-surface temperature	SubT	°C	Nürnberg, Dirk		G.truncatulinoides; (Cléroux et al. 2008)
9	Globorotalia truncatulinoides, Aluminium/Calcium ratio	G. truncatulinoides Al/Ca	mmol/mol	Nürnberg, Dirk
10	Globorotalia truncatulinoides, Iron/Calcium ratio	G. truncatulinoides Fe/Ca	mmol/mol	Nürnberg, Dirk
11	Globorotalia truncatulinoides, Manganese/Calcium ratio	G. truncatulinoides Mn/Ca	mmol/mol	Nürnberg, Dirk
12	δ18O, seawater, reconstructed	δ18Osw	‰ SMOW	Nürnberg, Dirk		G.truncatulinoides; ice-volume-free
13	Reference of data	Ref data		Nürnberg, Dirk

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

4588 data points

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